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Description of Business and Summary of Significant Accounting Policies (Tables) | 9 Months Ended
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Sep. 30, 2020
Accounting Policies [Abstract] |
Summary of Revenue from Services | For the three and nine months ended September 30, 2020 and 2019, revenue from these services consisted of the following (in thousands):
|  | Three months ended September 30, |  |  | Nine months ended September 30, |  |
|  | 2020 |  |  | 2019 |  |  | 2020 |  |  | 2019 |  |
Diagnostic tests |  | $ | 8,552 |  |  | $ | 3,770 |  |  | $ | 15,798 |  |  | $ | 12,716 |  |
Services |  |  | 641 |  |  |  | 172 |  |  |  | 2,730 |  |  |  | 3,565 |  |
Total revenue |  | $ | 9,193 |  |  | $ | 3,942 |  |  | $ | 18,528 |  |  | $ | 16,281 |  |
Schedule of Computation of Basic and Diluted Net Loss per Share Attributable to Common Stockholders | The following table sets forth the computation of the basic and diluted net loss per share attributable to common stockholders (in thousands, except per share amounts):
|  | Three months ended September 30, | Nine months ended September 30, |
|  | 2020 |  |  | 2019 |  |  | 2020 |  |  | 2019 |
Numerator |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net loss attributable to common stockholders |  | $ | (8,845 | ) |  | $ | (9,601 | ) |  | $ | (26,817 | ) |  | $ | (24,201 | )
Denominator |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Weighted-average shares outstanding used in computing net loss per share, basic and diluted |  |  | 277 |  |  |  | 244 |  |  |  | 269 |  |  |  | 233 |
Net loss per share, basic and diluted |  | $ | (31.93 | ) |  | $ | (39.35 | ) |  | $ | (99.69 | ) |  | $ | (103.87 | )
Schedule of Potentially Dilutive Securities Excluded from Computation of Diluted Net Loss Per Share Attributable to Common Stockholders | The following outstanding shares of potentially dilutive securities were excluded from the computation of diluted net loss per share attributable to common stockholders for the periods presented because including them would have been anti-dilutive for the three and nine month periods ended September 30, 2020 and 2019 (in thousands):
|  | Nine months ended September 30, |
|  | 2020 |  |  | 2019 |
Options to purchase common stock |  |  | 2,843 |  |  |  | 2,010 |
Convertible preferred stock |  |  | 119,257 |  |  |  | 119,257 |
Warrants |  |  | 613 |  |  |  | 2,440 |
Restricted stock units |  |  | 79 |  |  |  | 26 |
Convertible debt (1) |  |  | 20,746 |  |  |  | 16,240 |
Total |  |  | 143,538 |  |  |  | 139,973 |
(1) | The number of common shares that convertible debt was assumed to convert to was based on the Company’s estimated common stock price as of September 30, 2020, as determined by the Company’s board of directors (“Board of Directors”) with assistance from a valuation firm.

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- Definition Tabular disclosure of disaggregation of revenue into categories depicting how nature, amount, timing, and uncertainty of revenue and cash flows are affected by economic factor. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=121604090&loc=SL49130545-203045 + Details
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- Definition Tabular disclosure of securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) in the future that were not included in the computation of diluted EPS because to do so would increase EPS amounts or decrease loss per share amounts for the period presented, by antidilutive securities. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 + Details
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